Since there are now alternatives to the 1.7/20mm, which are equal or better in IQ (1.8/25mm, 1.4/25mm) and which have a fast AF, there isn't any point left to buy this lens, especially since the O 1.8/25mm is also pretty small and light.

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Thomas

Unfortunately, some of us greatly prefer the 20mm field of view to either of the 25mm lenses. I agree that the 20mm focuses poorly, and I replaced mine with the PanaLeica 25mm, but I wish I had the 20mm lens with better focusing performance, rather than the 25mm.

I went and bought the Sigma 19mm for times when I don't need the large aperture.